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Official Description

Percutaneous transluminal mechanical thrombectomy, vein(s), including intraprocedural pharmacological thrombolytic injections and fluoroscopic guidance, repeat treatment on subsequent day during course of thrombolytic therapy

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The procedure described by CPT® Code 37188 refers to a percutaneous transluminal mechanical thrombectomy performed on veins. This advanced medical intervention is utilized to remove thrombus, or blood clots, from the venous system. The procedure is characterized by the use of fluoroscopic guidance, which allows the physician to visualize the blood vessels and the thrombus in real-time during the intervention. Additionally, intraprocedural pharmacological thrombolytic injections may be administered to enhance the dissolution of the clot. The mechanical thrombectomy itself involves the use of specialized catheters and devices designed to either break up the thrombus, remove it, or capture it for extraction. Various mechanical devices, such as rotating wires, brushes, and retriever devices, are employed depending on the specific characteristics of the thrombus and its location within the vein. The procedure is typically performed in a controlled setting, ensuring that the physician can effectively manage the complexities associated with thrombus removal. This code specifically applies to repeat treatments conducted on a subsequent day as part of a comprehensive thrombolytic therapy regimen, highlighting the ongoing nature of care required for patients with significant venous thromboembolic conditions.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The percutaneous transluminal mechanical thrombectomy procedure, as described by CPT® Code 37188, is indicated for patients presenting with significant venous thromboembolic conditions. These conditions may include:

  • Deep Vein Thrombosis (DVT) - A condition where blood clots form in the deep veins, often in the legs, leading to pain, swelling, and potential complications.
  • Acute Venous Thromboembolism - A sudden blockage in a vein caused by a thrombus, which can lead to serious complications if not addressed promptly.
  • Complications from Thrombus - Situations where existing thrombus leads to complications such as venous insufficiency or pulmonary embolism.

2. Procedure

The procedure for percutaneous transluminal mechanical thrombectomy involves several critical steps, which are outlined as follows:

  • Step 1: Preparation - The skin over the targeted blood vessel is thoroughly cleaned and prepped to minimize the risk of infection. Local anesthesia may be administered to ensure patient comfort during the procedure.
  • Step 2: Accessing the Vein - A puncture is made in the skin to access the blood vessel. A sheath is then placed into the vessel to facilitate the introduction of catheters.
  • Step 3: Guiding Catheter Introduction - Under fluoroscopic guidance, a guiding catheter is introduced into the vein. This allows for precise navigation to the site of the thrombus.
  • Step 4: Advancing the Microcatheter - A microcatheter is advanced over a microguidewire through the guiding catheter and passed through the thrombus, allowing for targeted treatment.
  • Step 5: Thrombus Treatment - Depending on the type of mechanical device used, the thrombus is either fragmented or removed. If a rotating wire or brush is employed, it is activated to break up the clot. Alternatively, hydrodynamic forces may be utilized, delivering a stream of fluid to disintegrate the thrombus, which is then aspirated. If a retriever device is used, it is deployed beyond the clot to capture it for removal.
  • Step 6: Thrombolytic Injection - Throughout the procedure, a thrombolytic agent may be injected to assist in dissolving the clot, enhancing the effectiveness of the mechanical thrombectomy.
  • Step 7: Completion - After the thrombus has been adequately addressed, the mechanical device, microcatheter, and guiding catheter are carefully removed from the vein, and the access site is managed appropriately.

3. Post-Procedure

Post-procedure care following a percutaneous transluminal mechanical thrombectomy includes monitoring the patient for any immediate complications, such as bleeding or infection at the access site. Patients may be advised to rest and avoid strenuous activities for a specified period to promote healing. Follow-up imaging may be necessary to assess the success of the procedure and ensure that the thrombus has been effectively removed. Additionally, the healthcare provider may discuss ongoing management strategies, including anticoagulation therapy, to prevent future thromboembolic events.

Short Descr VEN MECHNL THRMBC REPEAT TX
Medium Descr PRQ TRLUML MCHNL THRMBC VEIN REPEAT TX
Long Descr Percutaneous transluminal mechanical thrombectomy, vein(s), including intraprocedural pharmacological thrombolytic injections and fluoroscopic guidance, repeat treatment on subsequent day during course of thrombolytic therapy
Status Code Active Code
Global Days 000 - Endoscopic or Minor Procedure
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 2 - Co-surgeons permitted and no documentation required if the two- specialty requirement is met.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Device-intensive procedure added to ASC list in CY 2008 or later; paid at adjusted rate.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 1
CCS Clinical Classification 61 - Other OR procedures on vessels other than head and neck

This is a primary code that can be used with these additional add-on codes.

37252 Addon Code MPFS Status: Active Code APC N ASC N1 Intravascular ultrasound (noncoronary vessel) during diagnostic evaluation and/or therapeutic intervention, including radiological supervision and interpretation; initial noncoronary vessel (List separately in addition to code for primary procedure)
37253 Addon Code MPFS Status: Active Code APC N ASC N1 Intravascular ultrasound (noncoronary vessel) during diagnostic evaluation and/or therapeutic intervention, including radiological supervision and interpretation; each additional noncoronary vessel (List separately in addition to code for primary procedure)
93568 Addon Code MPFS Status: Active Code APC N ASC N1 Injection procedure during cardiac catheterization including imaging supervision, interpretation, and report; for nonselective pulmonary arterial angiography (List separately in addition to code for primary procedure)
93569 Add-on Code MPFS Status: Active Code APC N Injection procedure during cardiac catheterization including imaging supervision, interpretation, and report; for selective pulmonary arterial angiography, unilateral (List separately in addition to code for primary procedure)
93573 Add-on Code Resequenced Code MPFS Status: Active Code APC N Injection procedure during cardiac catheterization including imaging supervision, interpretation, and report; for selective pulmonary arterial angiography, bilateral (List separately in addition to code for primary procedure)
93574 Add-on Code Resequenced Code MPFS Status: Active Code APC N Injection procedure during cardiac catheterization including imaging supervision, interpretation, and report; for selective pulmonary venous angiography of each distinct pulmonary vein during cardiac catheterization (List separately in addition to code for primary procedure)
93575 Add-on Code Resequenced Code MPFS Status: Active Code APC N Injection procedure during cardiac catheterization including imaging supervision, interpretation, and report; for selective pulmonary angiography of major aortopulmonary collateral arteries (MAPCAs) arising off the aorta or its systemic branches, during cardiac catheterization for congenital heart defects, each distinct vessel (List separately in addition to code for primary procedure)
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
Action
Notes
2017-01-01 Changed Moderate (Conscious) Sedation flag removed. See new Moderate Sedation category.
2006-01-01 Added First appearance in code book in 2006.
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